BELGRADE, June 17, 2016 (Xinhua) -- Chinese President Xi Jinping and his wife Peng Liyuan, accompanied by Serbian President Tomislav Nikolic and his wife, visit the historic Kalemegdan in Belgrade, Serbia, June 17, 2016. (Xinhua/Ma Zhancheng)
BELGRADE, June 17, 2016 (Xinhua) -- Chinese President Xi Jinping and his wife Peng Liyuan, accompanied by Serbian President Tomislav Nikolic and his wife, visit the historic Kalemegdan in Belgrade, Serbia, June 17, 2016. (Xinhua/Ma Zhancheng)